As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON LANDING WITH ZERO FLAPS THE POWER LEVERS WERE MOMENTARILY BROUGHT SLIGHTLY BELOW FLIGHT IDLE. THE NR 1 PROP RPM WENT RED ON THE ED. PROP RPM WENT INTO NORMAL AFTER 12 SECONDS. REPLACED BOTH NR 1 PROPELLER ASSEMBLY AND ENGINE ASSEMBLY, AND NR 2 PROPELLER ASSEMBLY AND ENGINE ASSEMBLY. OPERATIONAL CHECK FLIGHT GOOD. RETURNED TO SERVICE.